Reinforcing Old Cabinets for Granite

Granite is among the top contenders in natural stone countertops. Its aesthetically pleasing natural features allow for an almost infinite number of possibilities for any homeowner. Cabinet reinforcement isn't always needed for granite countertops because the granite spreads its weight evenly throughout the whole countertop. However, if you have thicker sheets of granite (3/4 inch or more) or older, weaker cabinets, you should reinforce them to ensure a stable setting for your new countertops. Reinforcement is also needed if the countertop has naturally occurring fissures or other issues.

Things You'll Need

• Measuring tape
• Marker
• 3/4-inch marine-grade or exterior-grade plywood, or medium-density particle board
• Jigsaw or other saw to cut plywood
• Drill
• Wood screws

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Instructions

1. • 1

     Measure the cabinet tops where you'll be installing the granite countertops.

   • 2

     Draw the pattern of your measured cabinet tops onto a piece of marine-grade plywood, exterior-grade plywood or waterproofed medium-density particle board.

   • 3

     Cut the plywood to sit perfectly on the cabinet tops.

   • 4

     Attach the plywood sub-top to the cabinets from the bottom (inside the cabinet into the plywood) using appropriate wood screws.

   • 5

     Install the granite countertops over the sub-top.